[stella] VDEL

Could someone write an overview of how VDEL is actually used in a kernel as
a vertical positioning system for me in such a way that I can just
paraphrase it into a voiceover? It seems that would be the easiest way to
do it.

Then I can focus on diagramming it.

The big three things I wanted to cover was VDEL, player positioning, and
polynomial counters.

I'm including a file here which is a shockwave flash that is supposed to
illustrate a 4-bit polynomial counter.

I would like to expand on this diagram to show how the TIA drives the
speaker with this type of counter, and how it performs sprite positioning
(via coarse and fine registers) in combination with the binary/decimal ->
poly value code.

Any stabs at one-paragraph encapsulations that a layman might be able to
grasp, but detailed enough to help describe a supporting diagram, would be
great.